Revert "remove rewrites from NextJS config (#5087)"

This reverts commit ba3013e.

clients/admin-ui/next.config.js

@@ -17,6 +17,31 @@ const nextConfig = {
      */
     proxyTimeout: 120000,
   },
+  async rewrites() {
+    // The tests run without a server. Rewrites cause Next to continually try to connect,
+    // which spams the logs with "ECONNREFUSED".
+    if (process.env.NODE_ENV === "test") {
+      return [];
+    }
+
+    // these paths are unnecessarily complicated due to our backend being
+    // picky about trailing slashes https://github.com/ethyca/fides/issues/690
+    return [
+      {
+        source: `/api/v1/:path`,
+        destination: `${process.env.NEXT_PUBLIC_FIDESCTL_API_SERVER}/api/v1/:path/`,
+      },
+      {
+        source: `/api/v1/:first/:second*`,
+        destination: `${process.env.NEXT_PUBLIC_FIDESCTL_API_SERVER}/api/v1/:first/:second*`,
+      },
+      // The /health path does not live under /api/v1
+      {
+        source: `/health`,
+        destination: `${process.env.NEXT_PUBLIC_FIDESCTL_API_SERVER}/health`,
+      },
+    ];
+  },
   images: {
     loader: "custom",
   },